I presume you mean keke Rosberg. I would say rosberg and g. villeneuve are from a different era than the rest you list. but that is my opinion.
to stick with contemporary drivers... wait, do you mean of the modern era or do you mean... ok, nm, I drank way too much coffee today.
for me, surely 1 - schumacher, 2 - senna, 3 - alonso, 4 - prost, and my emotional choice 5 - alesi.

I presume you mean keke Rosberg. I would say rosberg and g. villeneuve are from a different era than the rest you list. but that is my opinion.
to stick with contemporary drivers... wait, do you mean of the modern era or do you mean... ok, nm, I drank way too much coffee today.
for me, surely 1 - schumacher, 2 - senna, 3 - alonso, 4 - prost, and my emotional choice 5 - alesi.

Of course i meant Keke,Alonso is a hell of a driver too,but my surprise is Schumacher ahead of Senna!!! p.s, i was at the Montreal GP when Alesi won is only race.

Senna and Schumacher are locks for 1 and 2. End of discussion. After that it gets tricky.

Alonso is probably top 5 material.
Prost was a GREAT tactician; he's not top 5 on driving skill.
Villeneuve was just ballsier than the rest.
Mansell was a robot.
It's too soon for Vettel, but he'll get there soon.